Joseph d



J.D.CARTE.R. I APPARATUS FOR STRAIGHTBNING SHEET METAL. No. 67,495.

Patented'Aug. 6, 1867.

JOSEPH D. CARTER, OF THCMASTON, CONNECTICUT.

Letters Patent 1V0. 67,495, dated August 6, 1867.

IMPROVED APPARATUS FOR STRAIGHTENING SHEET METAL.-

TO ALL WHOM IT MAY CONCERN:

Be it known that I, JOSEPH D. CARTER, of Thomaston, in the county ofLitchfield, and State of ,Oonuecticut, ha e invented, made, and appliedto use a certain new and useful improvement in Straightening RolledSheet Metal; and I do hereby declare the following tobe a full, clear,and exact description of the said invention, reference being had to theannexed drawing, makingpart of this specification, wherein- I Figure 1is s vertical section of the machine employed by rnc for. straighteningsheets of rolled metal, and

Figure 9. is a plan of the same.

Similar marks of reference denote the same parts.

Sheet metal, when it is rolled, is seldom or never perfectly fiat. Itmay be reduced to a. perfectly uniform thickness, but it has anundulating surface, the undulations being generally at right ahgles tothe motion of the sheets through between the rollers. This undulation isparticularly detrimental in the sheets of brass employed for printersrules, because said rules are entirely useless unless perfectlyfiat,-and heretofore that condition could only be attained by costly andtedious manual labor.

My present invention relates to a method of ilattening a sheet or stripof rolled metal, and is especially adapted to the flattening of sheetsor strips of metal for printers rules, but may be employed for anycharacter of'she'ets of rolled metal. I

, The said invention consists in subjecting the sheet metal to a seriesof gradually diminishing bends between rollers or surfaces that actcrosswise of the set or bend of the plate, and such bends actingalternatelyin oppo-- site directions remove the previous set or bend ofthe plate, and gradually diminishing ultimately, leave thesheetperfectly fiat.

In order to effect this straightening the more rapidly,I mount a seriesof bed-rollers, a b c d e, in asuitable frame,f, and fit the rollers g hi I: in an ad'ustable frame, l, supported between standards m, andprovided with setscrews n and q. The rollers in the framel and thebed-rollers are to be geared together by a. train of wheels, showninfig. 2, and by dotted lines in fig. l each roller in the frame I comingabove the space between two of the bed-rollers in It will now beunderstood by the strip of sheet metal shown at o, in fig. 1, that thescrews 12. and q are to. be adjusted so that the strip of metal onentering receives a considerable head between the rollers a, b, andg,and that the next rollers g, b, k bend the sheet in the oppositedirection, but a less amount, and that the bends gradually diminish; andfinally the rollers d, k, and e simply remove the slight bend left bythe rollers 1', d, k, leaving the sheet perfectly flat.

For the purpose of straightenirg sheet metal, I claim the arrangement ofa series of rollers, in the manner described, by means of which a sheetof metal may be subjected to a series of gradually diminishing bendings,

as set forth. 1

In witness whereof I have hereunto set my signature this thirteenth dayof May, A. D. 186?;

JOSEPH D. CARTER.

Witnesses:

HIRAM Prsnce, D. S. Phone.-

